Vbox crash: installing to 2Gb dynamic expanding vdi

Description

*bug description:
host OS Archlinux, VM with dynamically expanding disk, size set to 2Gb, +iso mounted as a CD-rom.
The iso is installation media for Win XP, process starts well, boots, I partition the virtual disk, files start copying..and at some point VBox crashes.
*Please see attached dmesg, at the bottom there is a crash trace from Virtualbox.
PS: before this, VBox crashed my whole Linux!, could you review and eventually notify kernel devs as well?